IOWA ACADEMY OP SCIENCE 
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252. Lobelia syphilitica, L. Blue Lobelia. 
Also listed as a poisonous plant by Dr. Schaffner. 
253. Lobelia spicata, Lam. Pale Spiked Lobelia. 
Everywhere on prairies throughout the state. Probably poisonous like the 
preceding. 
254. Lobelia inflata, L. Indian Tobacco. 
Widely distributed, occurring in woods. The leaves of this plant were used 
by the Indians. The plant has long been used in medicine. Lobelia inflata 
is very poisonous, used for its action upon the pneumogastric nerve and the 
toxic doses produce exhaustion, dilation of the pupils. Death is usually pre- 
ceded by insensibility and convulsions. Contains the acrid lobeliine. 
255. Lobelia kalmii, L. Kalm’s Lobelia. 
Found only in swamps in northern Iowa. Probably poisonous like the 
preceding. 
Compositae. 
256. Cichorium intybus, L. Chicory. 
Has become widely naturalized in parts of the state. When fed in large 
quantities to dairy cattle it imparts a bitter flavor to the milk and butter. 
The bitter glucoside chicorin C 3 2 H 340 i 9 + 4 1 / £H 20 . 
257. Ambrosia artemisiaefolia, L. Common Ragweed. 
The pollen of this plant is suspected of causing hay-fever. 
258. Ambrosia trifida, L. Great Ragweed. 
The pollen of this species is said to produce an irritating action upon the 
mucous membrane. 
259. Xanthium canadense, Mill. Cocklebur. 
Young seedlings of this plant are poisonous to horses. Several cases of 
poisoning to hogs have been reported in this state. 
260. Xanthium strumarium, L. Cocklebur. 
Poisonous like the preceding. This species is not common in the state. 
Contains the glucoside xanthostrumarin. 
261. Eupatorium perfoliatum, L. Boneset. 
Commonly found in low grounds and marshes. Emetic in large doses. 
262. Eupatorium ageratoides, L. White Snake-root. 
Widely distributed in woods in this state. It is said to produce a disease 
known as milk fever. No reports of this kind of poisoning have come to the 
writers in this state. The E. cannabinum contains the alkaloid eupatorine 
C 20 H 25 O 30 HNO 3 and the glucoside eupatorin. 
263. Erigeron canadensis, L. Horse Weed. 
Widely distributed troublesome weed in the state. The physiological action 
of the drug obtained from this plant is to produce smarting of the eyes, 
soreness of the throat, and prostration. 
264. Solidago canadensis, L. Golden-rod. 
Widely distributed in the state, one of the most common of our golden-rods. 
The golden-rods are generally regarded as harmless plants, but in a few cases 
they are suspected of being poisonous. A disease of horses near Black River 
Falls, Wisconsin, was attributed to a golden-rod. Chesnut thinks the disease 
due to a rust on the plant. As a general thing stock does not relish the 
golden-rod. 
